External Wall Insulation in Finglas
Eradicate cold walls and black mould in Finglas with the certified Baumit external wall insulation system. We are Isotherm — direct SEAI-registered insulation contractors operating from Unit 20, Westlink Industrial Estate, Kylemore Road, Inchicore, Dublin 10. Our own employed crews specialize in wrapping 9-inch hollow concrete block homes across Finglas, fit bespoke aluminium window sills from our sister workshop Cills.ie, and deduct up to €8,000 in SEAI grants directly from your invoice.
Explore Surrounding North Dublin & Dublin 15 EWI Guides
Solving 9-inch hollow-block heat loss in Finglas
Finglas contains one of Dublin’s largest concentrations of 1950s, 1960s, and 1970s residential estates. Areas like Finglas East, Finglas West, Finglas South, Ballygall, McKee, Finglaswood, St. Helena’s, and Tolka Valley feature thousands of semi-detached and terraced houses constructed with 9-inch hollow concrete blocks. These homes suffer from acute thermal defects that make external wall insulation the essential retrofit solution:
Hollow blocks were designed with large vertical air voids to reduce block weight during mid-century construction. They lack a continuous cavity to pump with insulation bead. Applying a 100mm–120mm Baumit graphite EPS external wrap encloses the cold concrete in an airtight thermal shield, stopping up to 45% of building heat loss.
Because uninsulated hollow block walls conduct exterior cold straight to the interior plaster, warm indoor air condenses on bedroom and living room walls, causing chronic black mould growth. External wall insulation raises inner wall temperatures to room heat, moving the condensation point outside and eliminating mould permanently.
Exposed gable walls and concrete window lintels in Finglas semi-detached and end-terrace homes are major heat drain channels. Our crews fit high-density graphite EPS with continuous boundary seals and custom Cills.ie aluminium sills with integrated thermal breaks, completely insulating all window reveals.
Internal drylining in Finglas houses shrinks already compact bedrooms, requires moving radiators and electrical sockets, and creates weeks of internal dust. External wall insulation is carried out entirely on the outside, modernizing your facade with crisp silicone render while preserving every inch of interior space.
Why Finglas homeowners choose Isotherm over lead brokers
Unlike broker websites that pass your details to unknown subcontractors, Isotherm delivers direct contractor accountability from start to finish:
15–20 Mins From Inchicore Base
Operating from Unit 20, Westlink Industrial Estate in Inchicore, our operations hub is located minutes from Finglas via the M50 and N2. Our direct installation teams and technical supervisors are on site daily.
NSAI-Certified Baumit Applicators
We are fully certified Baumit applicators. Every house wrap utilizes matched, European-certified components—high-density graphite EPS, flexible basecoats, reinforcing mesh, and self-cleaning silicone renders.
Bespoke Cills.ie Metal Sills
We manufacture bespoke powder-coated aluminium window sills in our sister workshop Cills.ie. Featuring welded watertight end caps and thermal break pads, our sills eliminate water ingress and match your window frames seamlessly.
SEAI wrap grants deducted directly from your Finglas invoice
Isotherm is an SEAI Registered Contractor (#10423). We handle all technical pre-approval paperwork and grant compliance, deducting the grant value directly from your invoice so you only pay the net balance.
Calculate Your Finglas EWI Cost & Grant
Model your wall area, insulation thickness, and SEAI grant deduction instantly.
Our 6-step Finglas house wrap installation process
From the initial hollow-block laser survey to your final post-works BER certificate, our direct crews handle every stage with precision:
Site Survey & Laser Scan
We inspect hollow block condition, window reveal depths, plinth clearances, roof overhangs, and external service cables (ESB, gas meter, broadband).
SEAI Grant Approval
We lodge the SEAI Better Energy Homes grant application on your behalf, locking in your €3,500 to €8,000 grant pre-approval before scaffolding arrives.
Baumit EPS Board Fixing
We unclip services onto certified standoff brackets, adhere high-density Baumit graphite EPS with continuous boundary-bead adhesive, and mechanically anchor into hollow-block masonry.
Cills.ie Sill Installation
Custom powder-coated aluminium window sills fabricated in our Inchicore workshop are installed with thermal insulation pads and welded watertight end caps.
Reinforced Silicone Render
We embed alkali-resistant fibreglass mesh into Baumit ProContact basecoat, apply Baumit UniPrimer, and hand-trowel self-cleaning Baumit SilikonTop silicone render.
Post-BER & Net Invoice
An independent BER assessor conducts the final audit, your new B or A BER rating is published, and we deduct the full SEAI grant directly from your invoice.
Recent external wall insulation projects in Finglas
Explore recent residential hollow-block house wrap retrofits completed by our direct installation crews in Finglas:
Ballygall / Finglas East, Dublin 11
1950s 3-Bed Semi-Detached House
“9-inch hollow concrete block structure fully wrapped. Severe bedroom condensation and draughts completely eliminated; heating demand dropped by 48%.”
McKee Road / Finglas West, Dublin 11
1960s 3-Bed Mid-Terrace House
“Front and rear hollow-block elevations insulated. New thermally broken aluminium sills fitted; gas meter and ESB brackets extended on standoff brackets.”
Tolka Valley / Finglas South, Dublin 11
1970s 3-Bed End-of-Terrace House
“Large exposed gable wall and front elevation wrapped. Homeowner achieved a major comfort upgrade and warm interior walls throughout winter.”
External wall insulation questions in Finglas
How much does external wall insulation cost in Finglas in 2026?+
In Finglas, a standard 3-bedroom semi-detached or end-of-terrace hollow-block house costs between €13,000 and €19,000 gross. As an SEAI Registered Contractor (#10423), Isotherm deducts the €6,000 SEAI grant directly from your invoice, leaving a net out-of-pocket cost of €7,000 to €13,000. For mid-terrace houses (common across Finglas East, West, and McKee), gross costs range from €10,500 to €14,000, with our direct €3,500 SEAI grant deduction bringing the net cost to €7,000 to €10,500. Detached homes receive an €8,000 grant and apartments receive €3,000.
Can 9-inch hollow concrete block walls in Finglas be cavity-pumped?+
No. The vast majority of mid-century houses in Finglas (Finglas East, West, South, Ballygall, McKee) were constructed with 9-inch hollow-core concrete blocks. These blocks feature internal vertical voids rather than an insulated cavity, meaning pumped bead insulation cannot be injected. External wall insulation (EWI) is universally recognised as the single most effective and permanent solution for hollow-block walls, wrapping the cold concrete in high-density graphite EPS.
Do I need planning permission for external wall insulation in Finglas?+
For standard residential housing across Finglas, external wall insulation is classified as Exempted Development under Section 4(1)(h) of the Planning and Development Act 2000. It does not require planning permission from Dublin City Council as long as the exterior render finish is consistent with the surrounding streetscape. We review all boundary alignments, footpath clearances, and shared party walls during your physical survey.
How fast can Isotherm crews reach Finglas from your Inchicore depot?+
Our operations depot and fabrication workshop are located at Unit 20, Westlink Industrial Estate, Kylemore Road, Inchicore, Dublin 10. Traveling via the M50 Northbound or the Finglas Road / N2 corridor, our direct installation crews and project supervisors reach Finglas in just 15 to 20 minutes. This proximity enables daily site inspections, rapid material dispatch, and strict quality control.
How does a Baumit house wrap eradicate black mould and condensation in Finglas homes?+
Hollow concrete blocks have high thermal conductivity, causing interior wall surfaces to drop to freezing temperatures during winter. Warm indoor air hits these cold walls and condenses into moisture, breeding black mould (Aspergillus). Our NSAI-certified Baumit external wall insulation wraps the structural masonry from the outside, raising internal wall temperatures to room heat, moving the dew point outside, and permanently ending mould formation.
How do you handle window sills and services on Finglas homes?+
When 100mm to 120mm of Baumit EPS is installed, existing concrete window sills are no longer wide enough. Our sister company Cills.ie custom fabricates heavy-gauge, powder-coated aluminium window sills in our Inchicore workshop. Featuring welded watertight end caps and thermal insulation pads, our sills are colour-matched to your windows. Our crews also safely unclip ESB meter boxes and gas pipes, remounting them on certified standoff extension brackets.
Can I remain living in my Finglas home during the installation?+
Yes, 100%. All installation stages—scaffolding, EPS fixing, dowel anchoring, mesh basecoat, sill fitting, and silicone render application—are performed entirely on the exterior facade. There is zero mess inside your house, no loss of interior room dimensions, and zero disruption to your daily routine.
Related External Insulation Resources & Guides
Book your Finglas Baumit house wrap survey
Our own direct installation crews survey, wrap, and render hollow-block homes across Finglas. Guaranteed fixed-price quotes with SEAI grants up to €8,000 deducted directly from your invoice.